State
Pennsylvania: drinking water records
EPA lists 1,782 community water systems serving homes in Pennsylvania. 360 took part in EPA's national PFAS survey (UCMR 5), and 161 found at least one PFAS above the level laboratories can measure.
In focus1,782community water systems
Public records. Clearer context.
0
ZIP reports published
1,782
community water systems
701
systems with a health-based violation since 2016
152
systems that reached the lead action level since 2016
Counties
- Adams County 30 systems
- Allegheny County 39 systems
- Armstrong County 24 systems
- Beaver County 22 systems
- Bedford County 27 systems
- Berks County 74 systems
- Blair County 25 systems
- Bradford County 28 systems
- Bucks County 69 systems
- Butler County 32 systems
- Cambria County 36 systems
- Cameron County 3 systems
- Carbon County 29 systems
- Centre County 43 systems
- Chester County 60 systems
- Clarion County 14 systems
- Clearfield County 17 systems
- Clinton County 16 systems
- Columbia County 18 systems
- Crawford County 39 systems
- Cumberland County 27 systems
- Dauphin County 27 systems
- Delaware County 5 systems
- Elk County 8 systems
- Erie County 38 systems
- Fayette County 19 systems
- Forest County 4 systems
- Franklin County 30 systems
- Fulton County 3 systems
- Greene County 3 systems
- Huntingdon County 21 systems
- Indiana County 17 systems
- Jefferson County 11 systems
- Juniata County 13 systems
- Lackawanna County 31 systems
- Lancaster County 95 systems
- Lawrence County 15 systems
- Lebanon County 28 systems
- Lehigh County 42 systems
- Luzerne County 69 systems
- Lycoming County 29 systems
- McKean County 17 systems
- Mercer County 28 systems
- Mifflin County 6 systems
- Monroe County 66 systems
- Montgomery County 38 systems
- Montour County 1 systems
- Northampton County 44 systems
- Northumberland County 11 systems
- Perry County 24 systems
- Philadelphia County 2 systems
- Pike County 42 systems
- Potter County 10 systems
- Schuylkill County 42 systems
- Snyder County 16 systems
- Somerset County 33 systems
- Sullivan County 4 systems
- Susquehanna County 20 systems
- Tioga County 19 systems
- Union County 6 systems
- Venango County 25 systems
- Warren County 15 systems
- Washington County 6 systems
- Wayne County 38 systems
- Westmoreland County 15 systems
- Wyoming County 28 systems
- York County 44 systems
ZIP reports
Sources
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.